Finite Math Examples

$p (x) = - x$ , $q (x) = 2 x^{2} + 1$

Step 1

Replace the function designators with the actual functions in $p (x) + q (x)$ .

$- x + 2 x^{2} + 1$

Step 2

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Interval Notation:

$(- \infty, \infty)$

Set-Builder Notation:

${x | x \in ℝ}$

Step 3